Ok I have an 88 gta which I have put a 96 firebird formula rear end in, its a 6 speed 3.42 rear end, well the axle is bent. My brother has a rear end out of a 1999 v6 5 speed camaro. Are those axles interchangeable?

 

Maybe but those are both fourth gen axles. GM may have changed the axle length during the production run. There's a good chance they're identical, but you'll have to research fourth gen axle lengths.

If you're asking about the entire differential, yes they can be swapped.

 

Yea just the axle, the part where it unclips from the differential and slides out. I wasn't sure because I heard the lt1 cars rear end was a,little wider than the newer fourth gens. He said his was a 28 spline, this is my dd so I have to get it fixed quick. If their interchangeable then I just have to go get it and put it in.

 

All the 10 bolt axles starting in 1990 are 28 spline.

Just did a quick internet search.

93-96 f-bodies use 32-1/8" axles
98-02 f-bodies use 32" axles

I have no idea why there isn't a listing for 97 but the difference between the 96 and 99 is 1/8" which means it's probably not advisable to do a swap. You can always ask on a fourth gen site if such a swap exchange is possible.

 

Thanks iroc!

 

When you get post 96 axles some may be traction control while 93-96 will not be. I did alot of searching for my axle swap and many companies recommended the same pn#'s for any year - difference was the TC's vs. non-TC. If you have TC axle, ensure you replace w/ TC compatible axles, otherwise any non-TC will do. I had no problem w/ my axle swap for a post96 non-TC rear.